| US 7,532,683 B2 | ||
| Unified receiver for layered and hierarchical modulation systems | ||
| Joshua Lawrence Koslov, Hopewell, N.J. (US); and Kumar Ramaswamy, Princeton, N.J. (US) | ||
| Assigned to Thomson Licensing, Boulogne-Billancourt (France) | ||
| Appl. No. 10/556,544 PCT Filed Apr. 24, 2004, PCT No. PCT/US2004/013734 § 371(c)(1), (2), (4) Date Nov. 14, 2005, PCT Pub. No. WO2004/105302, PCT Pub. Date Dec. 02, 2004. |
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| Claims priority of provisional application 60/471167, filed on May 16, 2003. | ||
| Prior Publication US 2007/0011716 A1, Jan. 11, 2007 | ||
| Int. Cl. H03K 9/00 (2006.01) | ||
| U.S. Cl. 375—316 | 14 Claims |
| 1. A receiver comprising:
a down convener for providing a received signal; and
a demodulator having at least two demodulation modes for demodulating the received signal, wherein one demodulation mode is
hierarchical demodulation and another demodulation mode is layered demodulation, and wherein the demodulator comprises
an upper layer demodulator for processing the received signal to provide a demodulated upper layer signal;
an upper layer decoder for decoding the demodulated upper layer signal to provide a decoded upper layer signal;
an upper layer remodulator/reencoder responsive to the decoded upper layer signal for providing a reconstructed modulated
upper layer signal;
a combiner for combining the received signal with the reconstructed modulated upper layer signal such that an upper layer
signal component of the received signal is substantially reduced therefrom to provide a received lower layer signal;
a lower layer demodulator for processing the received lower layer signal to provide a demodulated lower layer signal;
a selector for providing a lower layer signal derived from either the demodulated lower layer signal or the demodulated upper
layer signal; and
a lower layer decoder for decoding the lower layer signal to provide a decoded lower layer signal.
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